Acids change blue litmus paper into which colour?
Answer and explanation
Correct answer: Red
The governing concept is the indicator test for acidic substances. Acids provide hydrogen ions in aqueous solution and turn blue litmus paper red. Therefore option A is correct. Blue is the unchanged colour of the paper, while green and yellow are not the standard litmus result for an acid. This test should be performed with a suitable sample and not by tasting an unknown substance.
Frequently asked questions
What is the correct answer to this question?
Red
Why is this the correct answer?
The governing concept is the indicator test for acidic substances. Acids provide hydrogen ions in aqueous solution and turn blue litmus paper red. Therefore option A is correct. Blue is the unchanged colour of the paper, while green and yellow are not the standard litmus result for an acid. This test should be performed with a suitable sample and not by tasting an unknown substance.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
